Trunnion-support for dumping-ladles.



EJO. SHERMAN.

TRUNNION SUPPORT FOR DUMPING LADLES.

APPLICATION FILED A]?R.16,1909A Patented M2115, 1910.

3 SHEETS-SHEET 1.

E. C. SHERMAN.

TRUNNION SUPPORT FOR DUMPING LADLBS.

APPLICATION FILED APR.16,1909.

Patented Mar. 15, 19M).

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INVENTOR 615. @Mmm QM. Qu/WWJSL. hd www;

E. G. SHERMAN.

TRUNNION SUPPORT FOR DUMPING LADLBS.

APPLIGATION FILED APB..16, 1909.

Patented Mar. 15, 1910.

3 SHEETS-SHEET 3.

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WITNESSES Y part of this specication,

Aenivre err-iras retrasar ERWIN C. SHERMAN, OF YOUNGSTOWN, OHIO, ASSIGIFYTOR T THE WILLIAM B. POLLOCK COMPANY, 0F YOUNGSTOWN, OHXOLA CORPORATION 0F OH.v

THUNNI()NZSUIPE"GRT FOR DUldPING-LADLES.

Specication of Letters Patent.' @aigri-mre@ Mgtyg 15, 1?@ t),

Application led April 16, 1909. Serial No. 436.5339.

To all whom it may concern:

Be it known that I, EnwiN C. SHERMAN, of Youngstown, Mahoning count 1, Ohio, have invented a new and useful mprovementi'n Trunnion-Supports for Dumpin' Ladles, of which the. following is a fu l,

clear, and exact description, reference being had to the accompanying drawings, forming in which#- Figure l is an end elevation of a ladle car having va toothed trunnion gear forming part or'. the ladle support constructed an'd arranged in ,accordance with my invention;

Fig. 2 is a detail side elevation on a larger scale of the trunnion gear shown in Fig. l; Fig. 3 is a sectional elevation 'of the gear on the line III-Ill of Fig. 2; Figs. a to 9 are l the ladle in diagrammatic views showing positions assumed by it in dumpdiderent ing.

i y mvention relatesto the construction of ladies used in handling molten materials auch as iron or blast furnace oinder, of the rolling or rocking type, which advance on their supports while being vemptied and the invention more particularly relatesto i1n' the dumping operation is automatically controlled.

proved means by which The object of m invention is to provide im roved means w ereb the ladle or tilting b y while either whol y or.partly. loaded is always in such position as will tend to cause it to assume its vertically upright position.

Heretofore in such cars, when the ladle or dumping body is being tipped in dumping, the trunnion gears which are generally'cylindrical, roll forwardly upon trunnion sup- 'ports provided for that purpose on the car Y dumped but body. During thedumpimr operation, while the molten materials are` owin from the cars, the weight of the materiaFs, together with that of .the ladle tends to dump ladle and should it not be held back by the dumping apparatus, would rapidly accelerate the speed of the dumping action and' thereby cause frequent accidents. When fluid pressure motors are used for dumping suchA ladles, on applying the iuid pressure to start'they umping operation, the ladle is a slight distance when the ma terials begin this occurs, the;center of gravity of the ladle and its oontentswillbe outside of a line eX- tending from theV cent/er of the ladle trunvload causes the ladle to tip the I toflow from the cars. When ,shown in Fig. (i,

nion through the point where the curved surface of the trunnion gear is tangent with the sur-face of the trunnion gear support. ln such ease the weight of the ladle and its suddenly, and to quite an extent, until such time as the :fluid pressure in the exhaust end ofthe dumping cylinder'is compressed suliiciently to overcome this tendency, after which the 1novement oi' the ladle is comparatively steady.'

By means of my improved apparatus, these diiiioulties are overcome and a steady dumping operation is insured at all points throughout the tipping or dumping operation of the ladies. I

In the drawings, 2 represents the ladle of a cinderiladle car mounted in a trunnion ring 8. The trunnion ring is provided with trunnions 4 upon which are secured 4the toothed trunnion gears 5, constructed and The teeth 5 outhe gears 5 mesh with siniilar teeth 6 on the horizontal rack (S :torniing part of the car 5*1 -o the gears 5 contacting with the rack surface 6R is made irregular in contour, its contour approximating the curvature of a semiellipse'. This curved surface preferably is arranged in such manner that at all times throughout the loaded ladle, 'the center of gravity of the ladle and amount of material in the ladle is 'between the vertical axis of the trunnion and a line extending from the point on the curvedsurface of the trunnion gear 6, then tangent with the horizontally extending rack `surface upon which the ladle is being moved through the center from which such curved surface is struck. in practice, however, it may be found-desirable in some cases to advance the center of gravit-y to a point vertically above the point of contacto?? the gear with the Asupport or even slightly in advance of this point oi' Contact.

Ars shown 1n Fig. al, the ,center of gravity 8 is on the vertical center line 9 of the car.

the dumping operation of 'arranged in accordance with my invention.

body 7, and thesurface When the ladle 2 is tipped into the position shown in Fig. 5,'the center of gravity 8 is between the vertical center line 'of the car 9 and a line l0 extending from the center through which the curved portion of the sui ort 5 is struck which is then tangent i b with the horizontal.trunnion support 6. As the center of. gravity 8 of the ladle and its load in the ladle is again located between the vertical center line. t) ofi tangentwith the Figs. 7, S and 9,

curved surface ot'.

the ladle tipped to snccessivelv greater amounts. the lowest position olthe ladle being shown in Fig. t). The ladle will be enthirty emptied in this position. ln each case Ythe center ot g avity S is located between the vertical center line t) ot' the car and a radial line ettending t'rom the point. on the gea 5 then tangent with the support t3 through the center trom which this portion of the curved .surface is struck.

The trnnnion gear and the gear support'. are arranged in sut-h manner that the results above described are obtained while dumping the ladle. in either ot' opposite directions. v

rlhe adt'antages ot' my invention will be apparent to those skilled in the art. By

matting the peculiarly shaped contacting` anr'liaces` between the trnnnion gears and snpports4 a .steady pouring action is .secured in operating the ladle and the renter olf gravity ot the ladle` which changes with ditlerent amountsI ol molten material in the ladle during the pouring operation, is always located at a pointy which will tend to bring the ladle hack into its vertically upright position. rThis 'lcatnrc is ot particular value, as in case o.E an accident to the mechanism 'l'ior tilting the ladle, in dumping, the ladle would right itself instead ot tipping in the opposite direction so as to quickly spill the molten contentsI oi1 the. ladle.

'lhe device is simple and is easily kept in -repair and may bly applied to existing latlles and ladle cars at a small cost.

illoditications in the construction and arrangement olf the gear and its supthiorting raclt may be made without departing trom my invention. Instead ot providing the peculiarly curved snr'lace on the gear, the gear may be made cylindrical and the rack made with an irregular' contour instead of the straighty line shown and other changes may he madel withoutI departing l'roin tny invention.

rihr, invention is applicable to ladies other than those used `in connection with a wheeled truck to Vlform a ladle car.

l 1li dumping ladle having ladle supports l which the ladle nieves iinwardly in nnping, said supports having .means cansa tendency in the dnn'iping ladle to ove into its vertically upright position throughout its dumping operation; substantially as described.

Ajunmping ladle. having ladle supports on which the ladle moves outwardly/in dni'ntiiing in either ot' opposite directions, means arranged to tend to canse the ladle to move into its vertically upright position throughout its dumping operation: suhstantially as described.

3. A dumping ladle having ladle supports on which the ladle rolls `outwardly in emp tying in either ot opposite directions, .said supports having means tending to cause the ladle and contents to assume vertically np' right position in all positions assumed during the dumping operation; substantially as described. i

-l-. A dumping ladle having ladle supports on which the ladle rolls outwardly in emp tying, said supports having means tending to canse the ladle when loaded to assume its vertically upright position in all positions assumed in emptying the ladle; substantially as described.

A\ dumping` ladle, having supports on which the ladle rollsy outwardly in emptying in either' of opposite directions, at least one element of each support having a eontacting surface of irregular contour which acts to maintain the center ot' gravity of the ladle and its contents .in a position to tend to canse it to assume an upright position thrtmghont its dimming movement; sub stantially as described.

t3. A dumping ladle having supports on which the ladle rolls outwardly in dumping` at least one element of the supports having an irregular curved,contour which acts to maintain the center of gravity o`l' the ladle and its contents,in a position to tend to canse it to assume an upright position throughout its dumping movement; substantially' as described.

T. A dumping ladle car having a trnnnion ring in which the ladle is mounted, trunnion gears on said ring, and toothed racks on which said gears roll outwardly in dumping the ladle, the contour of the, contacting sur- 'lfaces oit the. gears and racks being arranged to maintain the center ot' gravity of the ladle with the portion ot' its load then in the ladle between vertical lines passing through the points ot' contact. of the gear and rack and through thc-center of the car it all points throughout the ladle emptying operation; substantially as described.

8. A dumping ladle ear having a trnnnion ring in which the ladle is mounted, trunnion gears on said ring and toothed racks on which said gears roll outwardly in dumping the ladle, in each of opposite directions, the contour of the contacting surfaces on the gears and racks forming means to maintain the vertical center line of the trnnnion gear in advance of the center of gravity et the ladle and the remaining portion of its load at all points 'throughout the ladle emptying operation; substantially as described.

9. A dumping ladle car having a trunnion ring in which the ladle ismounted, trunnion gears on said ring, and toothed racks on eeaeee winch said ring is moved outwardly in l ports on Which'the ladle rolls outwardly in dumping the ladle, the eontourof the cen-y elnptyin the contour of tile contactmg su'ruacting surfaces of the gears and racks bein races o at least `one 0L th arranged to keep 'the center of gravity of elements having an irregular curved surload then 1n the ladle 1n a ocation tendmg curve of sald surface bemg constructed and to 1mg the ladle into its vertically uprlght arranged relatively to successive positions position; substantially as described. assumed by the center of gravity of the r ugnplng ladle car having a runf moving mass relative to the vertical center mon ring 1n which the ladle 1s mounted,v line o trunnion gears on' said rung, and toothed on the car and being also arran ed to canse racks on which the ring s moved outwardly a tendency 1n the dumping la le te move 1n dumping the ladle in eachof opposite l into its vertically upright position throufrhdirections, the contour ofthe contacting surto keep the center of gravity of theidump- In testimony whereof, I hav ingladle and the portion of its load then set my hand.l

' ERWIN c. SHERMAN. V-Vitnesses e here un to e supporting 

